Art of casting metal.



Patented Mar. 14, 1916.

WESLEY G. NICHOLS, OF CHICAGO HEIGHTS, ILLINOIS,- ASSIGNOR TO AMERICANMAN- GANESE STEEL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

ART or oasrnve METAL.

Specification of Letters Patent.

Patented. Mar. 14, 191%.

Application filed- January 3, 1916. Serial No. 69,830.

To all whom it may concern:

Be it known that I, WVEsLnY G. NICHOLS, a citizen of the United States,and resident of Chicago Heights, in the county of Cook and State ofIllinois, have invented. certain ndw and useful Improvements in the Artof Casting Metahof which the following is a specification.

My invention relates to the art of casting metal and has particularreference to a novel riser formation.

In the making of steel castings, particularly castings of large size, itis common to provide risers or bodies of metal extending considerablyabove the casting and designed to provide a head of metal to the endthat density in the casting shall be produced. This head of metal is asource of annoyance from a foundrymans standpoint, due to the fact thatit may be of any diameter up to thirty or forty inches according to thesize of the castings to be produced and must be broken in some mannerpreferably under the drop or skull cracker, before it can be remelted.In the formation of manganese steel castings great difliculty isexperienced i. breaking theserisers. To that end I have provided meanswhereby the riser may be sub-divided into segments during its formation,all without interfering with the efficiency thereof or without limitingthe size of the riser. The result is secured by providing a thin core,or diaphragm, of core material, the same being placed verticallytransversely of the opening for the riser, with the result that as themetal rises in the space it is divided by the diaphragm withoutinterfering in any way with the efficiency of the riser. If the riser isof a diameter of.ten inches or less, I have found a single divisionplate or diaphragm sufficient. However, for a larger riser I provide twodivision plates located at an angle of 90 to each otherwhereby the riseris divided into four sections. I

The invention will be more readily understood by reference to theaccompanying drawings, Wherein Figure 1 is a vertical sectional View ofa fragment of a mold and the riserto which my invention has beenapplied; Fig. 2 is an enlarged elevation of the riser after it has beensevered from the casting; Fig. 3 is a plan view of the'constructionshown in Fig.

2; Fig. 4 is a View similar to Fig. 2, showing a riser having but onedivision plate, and Fig. 5 is a plan view of the construction shown inFig. 4.

Referring more particularly to the drawings, it will be seen that Iprovide a mold 10 within which a casting 11 has been formed. Within amold 12, superposed on the mold 10 I provide a cavity for the accommodation of the riser 13. Mounted within the mold 12 with their edgesretained in the sand 14 of the mold are division plates or diaphragms15, 16, located vertically at an angle of ninety degrees to each other,where- 'by the space for the accommodation of the riser is divided intofour segmental spaces. The division plates 15 may be formed in twoparts, if desired, and merely abut the division plates 16. As ,the metalis poured for the formation of the casting it will rise in the spaceoccupied by the division plates and be formed in four segments. Afterthe riser has been separated from the casting these segments may bereadily disconnected from each other by a wedge and a sledge hammer andin that condition may be re-- turned to the furnace for re-melting.

In the construction shown in Figs. 4 and 5, the riser 17 is divided byonly a single plate 18. This, as stated, may be found sufiicient inrisers of small size.

While. I have shown the invention in certain forms in the drawings, itwill be understood that it may be varied by the provision of a largernumber of division ,plates, if desired, or the division may be made indifl'erent ways from that shown. Such variations as are within the scopeofmy claims I consider Within the spirit of my invention.

I claim:

1. In a device for molding, the combina tion of a mold for a casting, ariser mold superposed thereon and a division plate dividing the castingspace in said riser mold into a plurality of parts, substantially asdescribed.

2. A riser mold providing a casting space and a diaphragm of refractorymaterial dividing said casting space into a plurality of smaller spaces,substantially as described.

Q 1 r nsom 3. A mold for the formation of risers on Signed at ChicagoHeights, Illinois, this castings, comprising in combination a shell 30thday of December, 1915.

adapted to provide a casting space, and a- WESLEY Gr. NICHOLS. verticaldivision plate of refractory material I Witnesses: 5 dividing 'saidcasting space into a plurality M. 1. LA ZELLE,

of smaller spaces, substantially as described. CHARLES FAIILsTRoM.

